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Note 11 - COMMITMENTS (Details) $ in Millions	6 Months Ended
	Jun. 30, 2024 USD ($)
CBRT facility
Long-Term Purchase Commitment [Line Items]
Contract price for construction of new facility	$ 17.0
Construction payment for new facility	10.4
Construction remaining future commitment	6.6
CSB facility
Long-Term Purchase Commitment [Line Items]
Contract price for construction of new facility	41.3
Construction payment for new facility	$ 0.0

X

- Definition

The amount of contract price that was paid.

+ References

No definition available.

+ Details

Name:	qcrh_ConstructionCommitmentPaymentMade
Namespace Prefix:	qcrh_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The amount of contract price remaining for future payment consisting of work plus fee payable under construction commitment.

+ References

No definition available.

+ Details

Name:	qcrh_ConstructionCommitmentRemainingFutureCommitment
Namespace Prefix:	qcrh_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The minimum amount the entity agreed to spend under the long-term purchase commitment.

+ References

No definition available.

+ Details

Name:	us-gaap_LongTermPurchaseCommitmentAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_LongTermPurchaseCommitmentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=qcrh_CrbtFacilityCedarRapidsIowaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=qcrh_CsbFacilityInAnkenyIowaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: